/*
 * Copyright (C) 2009 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import java.util.Collections;

/**
 * GWT emulation of {@link EmptyImmutableBiMap}.
 *
 * @author Hayward Chan
 */
@SuppressWarnings("serial")
final class EmptyImmutableBiMap extends ImmutableBiMap<Object, Object> {
  static final EmptyImmutableBiMap INSTANCE = new EmptyImmutableBiMap();

  private EmptyImmutableBiMap() {
    super(Collections.emptyMap());
  }
  @Override public ImmutableBiMap<Object, Object> inverse() {
    return this;
  }
}
